The Lang Tools Diesel Compression Tester TU-15 is a reliable and efficient tool for testing diesel engine compression. With a maximum PSI of 1000, this tester provides accurate readings and helps identify potential issues with the engine. The product includes a carrying case for easy storage and transportation, making it convenient for mechanics and car enthusiasts to use on the go. Made by Lang Tools, a trusted brand in automotive tools, this compression tester is a must-have for anyone looking to diagnose and repair diesel engines.